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7Uses of Class org.apache.hadoop.mapreduce.Reducer (Hadoop 0.20.1 API)
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84<B>Uses of Class<br>org.apache.hadoop.mapreduce.Reducer</B></H2>
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86
87<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
88<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
89<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
90Packages that use <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A></FONT></TH>
91</TR>
92<TR BGCOLOR="white" CLASS="TableRowColor">
93<TD><A HREF="#org.apache.hadoop.examples"><B>org.apache.hadoop.examples</B></A></TD>
94<TD>Hadoop example code.&nbsp;</TD>
95</TR>
96<TR BGCOLOR="white" CLASS="TableRowColor">
97<TD><A HREF="#org.apache.hadoop.mapreduce"><B>org.apache.hadoop.mapreduce</B></A></TD>
98<TD>&nbsp;&nbsp;</TD>
99</TR>
100<TR BGCOLOR="white" CLASS="TableRowColor">
101<TD><A HREF="#org.apache.hadoop.mapreduce.lib.reduce"><B>org.apache.hadoop.mapreduce.lib.reduce</B></A></TD>
102<TD>&nbsp;&nbsp;</TD>
103</TR>
104</TABLE>
105&nbsp;
106<P>
107<A NAME="org.apache.hadoop.examples"><!-- --></A>
108<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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110<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
111Uses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A></FONT></TH>
112</TR>
113</TABLE>
114&nbsp;
115<P>
116
117<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
118<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
119<TH ALIGN="left" COLSPAN="2">Subclasses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A></FONT></TH>
120</TR>
121<TR BGCOLOR="white" CLASS="TableRowColor">
122<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
123<CODE>static&nbsp;class</CODE></FONT></TD>
124<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/SecondarySort.Reduce.html" title="class in org.apache.hadoop.examples">SecondarySort.Reduce</A></B></CODE>
125
126<BR>
127&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A reducer class that just emits the sum of the input values.</TD>
128</TR>
129<TR BGCOLOR="white" CLASS="TableRowColor">
130<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
131<CODE>static&nbsp;class</CODE></FONT></TD>
132<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/WordCount.IntSumReducer.html" title="class in org.apache.hadoop.examples">WordCount.IntSumReducer</A></B></CODE>
133
134<BR>
135&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
136</TR>
137</TABLE>
138&nbsp;
139<P>
140<A NAME="org.apache.hadoop.mapreduce"><!-- --></A>
141<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
142<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
143<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
144Uses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A></FONT></TH>
145</TR>
146</TABLE>
147&nbsp;
148<P>
149
150<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
151<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
152<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> that return types with arguments of type <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A></FONT></TH>
153</TR>
154<TR BGCOLOR="white" CLASS="TableRowColor">
155<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
156<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A>&lt;?,?,?,?&gt;&gt;</CODE></FONT></TD>
157<TD><CODE><B>JobContext.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getCombinerClass()">getCombinerClass</A></B>()</CODE>
158
159<BR>
160&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the combiner class for the job.</TD>
161</TR>
162<TR BGCOLOR="white" CLASS="TableRowColor">
163<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
164<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A>&lt;?,?,?,?&gt;&gt;</CODE></FONT></TD>
165<TD><CODE><B>JobContext.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getReducerClass()">getReducerClass</A></B>()</CODE>
166
167<BR>
168&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><CODE>Reducer</CODE></A> class for the job.</TD>
169</TR>
170</TABLE>
171&nbsp;
172<P>
173
174<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
175<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
176<TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> with type arguments of type <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A></FONT></TH>
177</TR>
178<TR BGCOLOR="white" CLASS="TableRowColor">
179<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
180<CODE>&nbsp;void</CODE></FONT></TD>
181<TD><CODE><B>Job.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/Job.html#setCombinerClass(java.lang.Class)">setCombinerClass</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A>&gt;&nbsp;cls)</CODE>
182
183<BR>
184&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set the combiner class for the job.</TD>
185</TR>
186<TR BGCOLOR="white" CLASS="TableRowColor">
187<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
188<CODE>&nbsp;void</CODE></FONT></TD>
189<TD><CODE><B>Job.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/Job.html#setReducerClass(java.lang.Class)">setReducerClass</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A>&gt;&nbsp;cls)</CODE>
190
191<BR>
192&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set the <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><CODE>Reducer</CODE></A> for the job.</TD>
193</TR>
194</TABLE>
195&nbsp;
196<P>
197<A NAME="org.apache.hadoop.mapreduce.lib.reduce"><!-- --></A>
198<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
199<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
200<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
201Uses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/reduce/package-summary.html">org.apache.hadoop.mapreduce.lib.reduce</A></FONT></TH>
202</TR>
203</TABLE>
204&nbsp;
205<P>
206
207<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
208<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
209<TH ALIGN="left" COLSPAN="2">Subclasses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/reduce/package-summary.html">org.apache.hadoop.mapreduce.lib.reduce</A></FONT></TH>
210</TR>
211<TR BGCOLOR="white" CLASS="TableRowColor">
212<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
213<CODE>&nbsp;class</CODE></FONT></TD>
214<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/reduce/IntSumReducer.html" title="class in org.apache.hadoop.mapreduce.lib.reduce">IntSumReducer&lt;Key&gt;</A></B></CODE>
215
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221<CODE>&nbsp;class</CODE></FONT></TD>
222<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/reduce/LongSumReducer.html" title="class in org.apache.hadoop.mapreduce.lib.reduce">LongSumReducer&lt;KEY&gt;</A></B></CODE>
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